Pro
Magnum Roller Rocker ArmsBefore we introduced our revolutionary Pro Magnum Rocker
Arms there were only two alternatives in competition
rocker arms: Stainless Steel for strength and reliability
or Aluminum for light weight and low cost. With the Pro
Magnum Rockers you get the best of both worlds.Pro
Magnum Rockers are made of 8650 chromemoly steel. This
material is some three times stronger than 7075-T6 aluminum
which is used for most aluminum rocker arms. Our engineers
used advanced computer technology (including Finite Element
Analysis) to refine the Pro Magnum Rocker.
We added strength where it was needed and reduced mass in
low stress areas. The result: Pro Magnum Rocker Arms
have less weight (5%) at the valve than most aluminum rockers.
This means more RPM and valve train stability.

The
unique design of the Pro Magnum Rocker enables us to
use a larger trunion with more needle bearings. This spreads
the load more evenly and the rocker will last longer. Other
features include an integral pushrod seat that insures accuracy
and saves weight, a unique rocker design also provides plenty
of clearance for most high performance valve springs.

Chart
Footnotes:A. Will
not replace late model pedestal rockers. See page 285 for
stud conversions.B. Must use screw-in studs and
guide platesC. Will not replace late model
rail rockerD. Requires a ball / ball pushrod